Night Stuff Flashcards
Proper Scan technique
- The pilot must keep his head moving between several reference point to notice drift
a. The Reference points should be stationary objects - Detect drift by looking opposite of the direction of drift.
a.Forward for lateral drift
b.Abeam point for forward/aft drift
c. Scan inside to the RADALT for altitude drift.
53 Exterior Lights
PUMPFLASID
Position
Utility Hoist Flood
Main Rotor Head
Probe
Formation
Land/Hover
Anticollision
Spot
Infared
Drouge
53 Interior Lights
NP CLUS CP
NonFlight Instruments
Pilot Flight instruments
Co-pilot flight instruments
Lower console
Upper console
Secondary flood lights
Cockpit white lights
Portable utility lights
53 Cabin Lights
CLERC
Cabin dome lights
Loading lights
Emergency exit lights
Removable emergency lights
Cabin panel lights.
NVG: Assembly Preflight Presets
Eyepiece and Diopter Assembly
Diopter- Full CCW then back to 0
Eyepiece full CCW
For/aft relief: full forward
Center tilt: level
Set IPD: to middle
NVG Adjustment Procedures:
Adjust in this order
Vert
Tilt
Eye Relief: Looking for 25mm approx 2 fingers
IPD: too close together the outside of the image is blurry and vice versa
NVG Mil Specs
20/25
NVG Go/No-Go
20/30
3 Noticeable Improvements with the WP I2 tube
- Reduction in Halo size
- Increase in obstacle detection distance
- Reduced time for target correlation during ordnance employment
What part of the EM spectrum does the AN/AVS-9 use? (the NVGs) What is peak sensitive?
Near IR
.6-.9 microns (micrometers)
Define Illuminance?
what is the unit of measurement?
The amount of light generated from a source
2. Expressed in Lux or lumens per square meter(lm/m^2)
Define luminance?
State its unit of measurement?
the light that an object reflects.
expressed in foot-lamberts (ft-L)
The ratio between Illuminance and luminance is?
Albedo
What 3 factors influence NVD performance?
- Illumination/thermal Scene Factors
- Terrain contrast
- atmospheric conditions.
What 4 factors influence the amount of light provided by the moon?
- Lunar Cycle
- Moon Angle
- Lunar Albedo
- Variation in the earth-to-moon distance
How Long is the lunar month?
29.5 days.
IIMC is more probable on NVGs why?
Due to the NVGs seeing in the Near IR they can see through thin clouds and marine layers.
Cues that you’re going into IIMC:
HOGDLR
- Halo effect increases (M)
- Obscuration of the Moon and Stars (M)
- Graineness/Scintillation (M)
- Degraded Image
- Loss of Ground reference (M)
- reflection of the anticollision light
(M) = denotes in the NVD manual.
Eyepiece assembly designed to provide how much eye relief IOT to get the entire 40degree FOB?
25mm
You get the red low battery light indicator at what voltage?
2.2V
Image Defects
- Shading
- Edge Glow
- Bright Spots
- Dark Spots
- Honey Comb
- Distortion
- Flickering
- Scintillation
What is collimation?
take the separate picture from the two monoculars and align them for viewing
nomenclature for the hud
AN/AVS-7
Purpose of the HUD?
Purpose is to provide pilot and copilot flight data allowing them to focus their scan outside.
Nomenclature for FLIR
AN/AAQ-29A (Forward Looking Infared)
FLIR FOVs
wide (1x), medium(6x), and narrow(23x)
In what micrometer band does the FLIR see?
3-5 microns (micrometers)
FLIR modes of operations
Cruise Mode(CRUS)[constant airspeed and altitude/no symbols]
Acquisition Mode(ACQ)[to acquire ground target/ no symbols]
Transition Mode(TRNS)[below 60 knots]
Hover Mode(HVR) [below 5 knots]
Position Mode(PSN)[below 5 knots]
FLIR Turret Servo Modes
7 of them:
1. Look ahead
2. Stow
3. Normal
4. Auto track enable
5. Rate
6. Autotrack
7. Scan
FLIR Auto track acquisition modes
Best fit BFIT
Motion difference MDIF
Intensity difference IDIF
Manual Gate MANG
Auto track mode has what two types of tracking?
Centroid and correlation
FLIR: What is Centroid tracking used for? Correlation tracking? Can they be combined?
- High contrast targets.
- Low contrast
- Yes they can
FLIR: what are the 4 AT Algorithm modes in sequential order?
Centroid
Correlation
Complementary
Automatic Tracking
If CHOT remains visible after 18 minutes, what should be conducted?
Turn it off
At what humidity level does it become an effective wall for the FLIR?
20g/m3
What do you do if you get:
1) CHOT
2)PHOT
3)THOT
1) CHOT(cyro > 100k)= On startup wait 18 min run BIT of still visible shutdown
2) PHOT(SEU hot) = shutoff
3) THOT(FLIR unit hot)= shutoff system
How does do the Autotrack algorithms work?
- Centroid- locates a shape within track gate and tracks the centroid(center of it)
- Correlation- utilizes contrast of the image to track.
- Complimentary- uses both simultaneously
- Automatic tracking- chooses between Centroid and Correlation continuously and depending on target and background uses whichever is best.
What is FOR?
Field of Regard
Is the total angle the TFU(turret FLIR unit) can be positioned in azimuth and elevation relative to the centerline
What does the FLIR SEU do?
System Electronic unit
Controls TFU servo functions, processes FLIR video signals and manages auto track functions
What does the FLIR DEU do?
Display Electronic Units (DEU)
in Right eBay
Provides power forms, horizontal and vertical deflection, and BIT
FLIR BFIT:
- Reduces pilot workload with little interaction.
- When tracking box automatically resizes itself to the target and moves to the center of the display.
FLIR MDIF:
- Used to detect motion within the track area
- Select target scene; pull to 1st trigger to initiate, display should go to TAPD; once motion is detected solid box, sizes and centers target
FLIR IDIF:
- Used to detect differences between stored reference intensity values and new intensity changes.
- Once in the TAPD mode, the system sets the reference intensity values and utilizes the highest intensity value to track. Once the system has detected a change in the intensity value, a solid line track gate is placed around the target. The system then resizes the gate and centers it in the display.
How do you stop tracking on the FLIR?
Pull to the second detent.
FLIR:
When do you change the gov when tracking?
Step down when target can no longer be continued in track gate max size
Step up when target size reaches approx ½ max gate size
How shades of grey should be distinguishable during FLIR setup?
10
